Furnace-front air-valve system



J. REID.

FURNACE FRONT AIR VALVE SYSTEM.

' APPLICATION FILED AuG.7, 1919.

Patented Mar. 30, 1920.

. plied to 7 To all whom it may concern;

ri'rnn STATES PATENT oFmoE.

JOHN REID, on NEW YORK, N. Y.

rurt vnon-raonr AIR-VALVE SYSTEM.

Application filed August 7,1919. Serial N0.T315,993.

The'invention consists essentially of the novel placement of valves in the passage for the flow of air from the air supply to the ash pit in the forced draft type .of furnace fronts having'front and back plates, upper air chamber wall and flare leading to .the ash pit. r e Th objects of the invention are to accommodate the construction of the Reid type of furnace front, in which the fuel passage casing or as more commonly termed the firebox casting is withdrawn in converting thefront for liquid fuel purposes, or for repairs or replacements; to further promote the work of standardizing the parts of furnace fronts, particularly for marine work, where quick installations and rapid repairs mean great saving in money by avoiding delays in sailing or en route; to insure good seating for the valves and a convenient setting; and generally to provide a valve system that will prove eflicient and durable without increasing the cost of production to any material extent if at all.

111 the drawings, Figure 1 is a front elevation of the back plate, mediate parts between the front andback plates, including the valves, in section.

Fig. 2 is a side elevation of the front apthe mouth of a boiler furnace. is a perspective detail of a valve.

Fig. 3

detail of the Fig. 4. is a handle. 7

Fig. 5 is a diagrammatic view, showing the course of the air in a furnace front in stallation.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, indicates the air chamber wall, preferably rigidly secured to or forms part with one or the other or 2 and 3 forming thefront and back plates of a furnace front of the forced draft type.

Specification ofLetters Patent. Patente shafts l5 and 16,

showing the intervalve shaft and the numeral 1 which is both of the plates The wall 1 is above and on either side of the fuel opening in the front plate 2 and the fuel opening in the back plate 3 and at its lower ends is turned inwardly as indicated (1 Mar. 30,1920.

by the numeral l, Where it meets the fuel passagecasing '5, the latter being preferably removable. 7 j

The flare 6 leading to the ash pit bridges the space between the plates 2 and'3 at its lower portion following the shape of the plates and at its upper ends is flanged outwardly at 7 and 8 forming immediately be low said flanges substantially vertical walls 9and10. a

The flare 6 is rigidly secured part with one or the other or both of the plates 2 and 3 and its upper ends are obliquely op osite the angle of the inturned ends 4, there y forming seats for valves on the vertical portions of the wall 1 and onthe vertical portions 9 and 10 of the flare 6.

The valves 11 and 12 are offset at the ends 13 and 14 in opposite curves to meet the vertical portions of the wall 1 and the ver tical' walls 9 and 10, and are mounted and fixedly secured to the fiat portion ofthe suitable handle operating device.

The valves 11 and 12 extend obliquely across. the passages which are formed by distancing the plates 2 and 3 and which lead from the air supply to the ash pit, and at their upper ends abut the downwardly extending parts of the wall '1 and at their lower ends abut upwardly extending portions of the flare 6.

This invention is particularly-adaptable to fronts, where it is essential that the side valves should be out of the way, when any changes are required, such asremoving the which are operated by a to, or forms fuel passage casing in converting the fur nace for oil burning or in making repairs,

because following the description of the parts in detail, it will readily be seen that the valves remain a permanent fixture quite beyond all ratus for oil burning and yet are in the very best position to insure efficiency in operation.

Various changes may be made without departing from the spirit of the invention and so. long as such changes are within the scope of the claims for novelty following the pro tection accorded shall not be invalidated.

What I claim is i 1. In a furnace back plates provided with alining fuel openoperations in introducing appalOO ' front having front and ings, a removable fuel passage casing seated in the fuel openings therein, an air'chamber wall extending from the back plate above the fuel openings and having downwardly directed parallel ex tensions, a flare forming the way to the ashpit andbridging the space vbetween the front" plate and the back plate and having up-: wardly directed parallel extensions spaced from said first named extensions and from said openings, forming ports between theair chamber walls and the upperportions of the flare, and valves pivotally mounted between the front andv back platesbetwee'n said sets of extensions and at their ends abutting the respective extensions of the air chamber: wall and flare to close the aforesaidports.

2. In a furnace'front having front and vertical parallel walls and with the afore air chamber;

said vertical portions of the wall. forming valve seats, and valves journaled in the front and closed extendingobliquely from the vertical portions of the air chamber wall to the vertical portions of said flare.

3. In a furnace front having front and back plates forming air passages to the ash pit between intermediate parts, said plates having alined fuel openings, an air chamber the front plate to r back plates and when wall'havi'ng downwardly extending portions on either side of the fuel openings in the front and back plates and terminating in inwardly openings, a removable fuel passage casing introduced into bridging the way;

turned extensions to said fuel said fuel openings, aflare tothe ashl{'pit;-and,i up I I wardly' turned and jflianged at-ithe'up'per end, 1 said downward extensions of the air chamber wall and upwardgextensions of; the flare;-

forming seats 'forfthe valvesfand valves mounted on shafts suitably journaled and having oppositely curved voffsets atthe upper and lower endsformed correspondingly tomeet said'seats. 7 i I 4; Ina furnaceifront 'havingjfront and back plates "provided with alinin'g fuel openair passages to the ash-pit'between intermediate parts, a removable fuel ing mounted in said'fuel openings, an air chamber wall having downwardly'eXtend-v 1 ing portions on either side of the fuel openin inwardly turned extensions to said fuel openings,: a flare" bridging the way to the ash-pit and. having" upwardly extending extensions cooperating v with the downwardly extending portions of wall to formvalve seats,"

ings and "terminatingtheair chamber and valves journaled between the front and back plates and offsets at their flare and the respective downwardly extending portions of the air chamber'w'alh Signed at the city ofNew York this-17th- 1 day of July, 1919. 7

JOHN REID;

therein, said front" being formed with having oppositely turned opposite ends for seating: against the respective upper ends of the passage cas- V 

